My first post!Question:I ordered the Zenbox with a volume control.Can someone explain to me how I would use the Zenbox and take advantage of the volume control.For example say I had a Cd transport and a dac, and a Power amp.

I'm not the best person to answer as far as the technicality, but I believe that the ZBox varies the volume in a different, less totally linear way than the CSP series preamps do. Also the CSP series preamps have adjustable output gain per channel, and a far larger power supply. The ZBox can't allow you to tailor the sound the way the others do. The ZBox does offer some tonal and textural changes in a different way, but the CSP series preamps offer greater weight and dynamics to the sound.

The main difference I suppose is that the ZBox does not increase gain, but the CSP preamps dish out gobs of gain. And this has a large sonic impact.